Polished-rod rotator



Apfil 24, ms 1,657,187

A. BOYNTON POLISHED ROD ROTATOR Filed June 29. 1-926 2 Sheets-Sheet .1

April 24, 1928. 1,667,187

A. BOYNTON POLISHED ROD ROTATOR Filed June 29. 1936 I 2 Shaets-Sheet 2 lilllulllll? v gwowntoc Patented Apr. 24, 1928.

UNITED, STATES PATE r oFF ALEXANDER BOYNTON, or SAN ANTONIO, TEXAS. it

, POLISHED-ROD ROTATOR.

Application filed June 29, 1926, Serial No. 119,569.

This invention relates to rotors of the positively actuated type, especially adapted for usein intermittently turning the polished rod and other reciprocating equipment 01" a pumping well.

Briefly stated, an important object of this invention is to provide a polished rod rotor which may be economically and expeditiously installed on a pumping well to impart an intermittent clock wise rotation to the rods to avoid partingof the rods at one or more joints thereof, and to avoid the formation of squirt grooves in the working barrel and the plunger or cups reciprocating therein, all of which overcomes cutting of the oil and the necessity for frequently pulling the rods etc. i f y A turtherand equally important object of the inventionis to provide a positively actuated rotor comprising novel means by which the rotor is rendered temporarily inoperative should the cups or plunger become stuck inthe working barrel whereby twisting of the rods to the breaking point is prevented. W A

Other objects andadvantages will be apparent during the course of the following description. A

In the accompanying drawing torminga part of this application and in which like munerals are employed to designate like parts throughout thesaine, I I i Figure 1 is a-sidejelevation of the improved rotor applied;

Figure 2is a frontqclevationof the improved rotor applied; p 1 ,7

Figure 3 is aperspective ota saddle embodied in the invention;

Figure 4 is a'detail'sectional vievv illustrating a slight modification of the invent-ion applied. I i 1 In the drawing, the numeral 5 designates the beam of a: pumping jack while the numeral 6 designates-a polished rod trunnion through which a'polished rod 7 extended in the usual and well known manner.

The invention contemplates the employment of what might besaid tobe a U-shaped saddle 8 having a centrally arranged openingto receive the polished rod and having sides recessed at thelower' ends thereof, for partially receiving the; lateral branches of the trunnion 6 asclearly shown in Figures 1 and- 2.- The walls or" the recesses in the lower terminals of the saddle are provided with shallow notehes 9 to receive burrs trunni one.

which may be on the'lateral. branches of the I It might be'added that such burrs are frequently present on 'thelateral branches of the trunnion as a'resultof parting oiithe molders pattern. The provision of the "shallow recesses 9 also "enables the curved walls of the recesses atfthe' lower ends of the saddle to have a better contact with the trunnion to 'avoid lost motion.

That is to say, the presence of the shallow recesses 9 permits of the desired limited rocking of the saddle on the trunnion as a result of the conversion of the rocking of the beam into the reciprocation of the rods.

The saddle is provided in the topjthereot,

with a shallow recess 10 freely receiving the lower portion of the hub of a ratchet wheel 11. Sufficient clearance isleft between the hub and the side wall of the recess 10to freely receive a'suitable lubricant which may be introduced withthe aid of a squirt can or otherwise.

In carrying outthe invention, the hub of the ratchet wheel 11 is extended above the ratchet wheel and is provided with a plu rality ot setscrews'12 adapted to engage the polished rod to positively lock the ratchetwheel to the rod. Therefore, intermittent rotation of the ratchet wheel will result insimilar rotation ott 'the polished rod. A polishedirod' clamp 14; of conventional'or other design may be connected to the polished rod in'imediately[above the ratchet wheel to transmit; the ,load of the polished rod "to the ratchet wheel and from the ratchet wheeljto the saddle: 8. At thispoint, it is noted that preparatory to and during the application of the palished rodclamp 14, the original polished rod screwlof the trunnion is allowed to remain tight. How

ever, after the clamp has been properly applied, the original screw of the polished rod isloosened to allow ot the free intermittent turning of the polished rod under the influonce of the rotor. Figure 2 clearly illustrates that the saddle 8 is provided with a; laterally] projecting suitably braced stub shaftlS upon which the hub 20 ct a crank arm 21 ismounted for the limited rocking aiecessaryfor the successful. operation of the device. Theupper portion of the crank 21- is provided with nbearing receiving a pivot bolt22 upon which, a pawl. 24 is loosely mounted; v. i T Theqpawl24is in turn, engaged, with the radialteeth on the. uppersurfaee of the ratchet wheel so that when the crank 21 is rocked in a 'counter'clock wise direction the ratchet wheel and the rods will be turned in a clock wise direction to exerta tightening force on the rodsat the joints thereof, and to turn the cups or plunger, asthe case may be, in the working barrel whereby to avoid the formation of squirt grooves or jets in the working barrel and the reciprocating equipment therein. be it cups or a plunger. As previously stated, by thus avoiding: the iorinati'on of grooves in the working barrel and the cups therein, cutting of the oil is avbicled' and the necessity for frequent pulling of the rods is overcome. liurthermore, the efiiciency of the pump is substantially ii'icreased as each stroke of the pump will result'in maxinnini production, provided of course, other tactors do iiot'interetere.

Bctoreproceeding with the description of theo perating means for the cran; 21, it is desired to'em ghasize the important tact that should'the cups or theplunger become stuck in the working barrel the rotor will not twist the rods to the breaking point. Assuming the cups are stuck firmly in the working barrelthe rotor will continue to turn the rods until suflicient-back strain has been built up to turn the ratchet wheel in a counter clock wise direction on the return movement of the paw12t. 'It is important to observe that in the normal operation of the rotor, the hub of the ratchet wheel turns in. a clock wise direct'ionin tlie recess 10 when actuated by thepawl QQL and: the weight of the rods on the hub of the ratchet wheel will cause the ratchetwheel to remain in a fixed position during the return or back stroke of the pawl 25L However. if the cups are stuck, suflicient back twist will be built up in the sucker rods to turn the ratchet wheeliback during the return of theratchet 2 L notwithstanding the friction between the lower end of the hub and the bottom wall of the recess 10. The moment-the cups are freedthe rotor'will again function normally and impartthe desired intermittent rotation to the-rods, a feature of major importance.

The bearing 20 is provided with a sprocket wheel 26 about wliicli the intermediate portlon of aspiocketchain 27 is trained. One end of" the chain 27 is. as illustratedin Figure 1, connected to an anchoring clip 28 throi'lglithe medium of a tensioning spring 29. The other end of the chain is trained about and is therefore anchored to a sprocket wheel 30. The sprocketwheel is in turn nonrotatably and adjustably connected to an attaching arm '31 through the medium of a nut and bolt 32. If desired the anchoring device .2 8 may also be in the nature of a sproeket'wheell z "Figure l'clearly illustrates that the bolt 32 isv extendectthrough a slot'33 in the arm ans bo 'lt'rnay be easily adjusted in the slot so that the effective movement of the chain may be varied,' this feature providing a means whereby the effective movement of the pawl 2 1 may be regulated. Of

'course, it' is preferableto have the anchored parts of the chain approximately equal distances intront and in back of the polished red as suggested in Figure 1. This figure clearly'shows that the clip 28 is mounted on a bolt 35 adjustable in a slot 36 similar to the slot so that both the clip 28 and the wheel 30 maybe easily adjusted. The outer terminals of the slots 83 and 2-36 may, be en larged to allow otthe passagreof the heads ot-the bolts and duringthe applica tion or removalof thesame.

Further reference to Figure 1 will show that the sprocket wheelZE'O may be adjusted about the axis of the attaching bolt g2 and the,b0lt subsequently tightened to positively hold the ratchet wheel' 3O against turning. The coil spring 29 provides a simple means whereby the chain maybe tensioned.

.The arm 31 is attached to the beam at one side thereof by an attaching plate 40, the ends 4101 which are extendedabout some of the flanges of the beam 5 and are firmly anchored in place means ota set'screw 4-2. A. wedge43 may be employedbetween one of the ends -ill of the lii ase ltland the adjacent flange of the beam.

In the form of invention illustratcd in l ig'ure ithe relatively ti ed member 50 corrcs -iondingto the saddle 8 may be in the nature of: a hollow cylinder having set screws 51 which maybe engaged with the upper portion of the trunnion whereby to lock the member50 to the trunnion. Intliis case the upper portion otthe saddle 50' may'bc recessed to receive the upper portion of the hub of the ratcheflwheel; allot which is clearly shown. i

Having thus described t-he invention vhat is claimed is: A

1. A polished rod rotor comprising a ratchetwheel having a hubprovided with means whereby the same may be-locked' toa polished rod. a crank having apawl' engaged with said ratchet wheel, a sprocket wheel having'connection with said crank. and a chain trained about said sprocket-wheeltor rocking the same.

2. A polished rod rotor comprising a ratchet wheel having: a hub provided with means whereby the same may belocked to a polished rod, a crank having a' pawl engaged witlr'sa' id ratchetwheel. a sprbcket wheel havingconnection with said 'crankla chain trained abouit'said s vrocket Wheelfor rocking the same, an'dan anchoring device for connectiniz' -th ends of the chain to the beamo fa pumpingjac k.

3. A polished 7 rod rotor comprising a ratchet wheelhaving a hub provided with m an whereby the l may ilcekedi e a polished rod, a crank having a pawl engaged with said ratchet wheel, a. sprocket wheel having connection with said crank, a chain trained about said sprocket wheel for rocking the same, and an anchoring device for connecting the ends of the chain to the beam of a pumping jack, there being means whereby excessive back twist in the sucker rods oi a well pump may be relieved.

4. A polished rod rotor comprising a saddle having means whereby the same may be rigidly mounted on a polished rod trun nion, a crank arm rotatably connected to the saddle and having a pawl, a ratchet wheel engaged by said pawl and having a hub provided with means whereby the same may be locked to a polished rod, a power transmitting member connected to the crank tion thereof, trained about the wheel, an arm adapted'for connection to a jack beam, and anchoring devices having means whereby the same may be adjusted on the arm, said chain being connected to said anchoring devices.

6. A polished rod rotor comprising a ratchet wheel having means whereby the same may be attached to a polishedrod, a saddle supporting the hub, a crank having connection with the saddle and provided with a pawl engagingthe ratchet wheel, a sprocket wheel connected to the crank, a sprocket chain having the intermediate por tion thereof, trained about the wheel, an arm.

adapted for connection to a jack beam, anchoring devices having means whereby the same may be adjusted on the arm, the ends of said chain being connected to said anchoring devices, and tensioning means for said chain.

7. Apolished rod rotor comprising a" driven member having means whereby the same may be'connected to a polished rod, a sprocket wheel having connection with said driven member, a chaintrained about said wheel, a second sprocket wheel having connection with said chain and constituting an attaching means for oneend of, the same, a second attaching means for the other end of'the chain, and an arm supporting said first and second named attaching means and adapted for connection with a jack beam.

8. A polished rod rotor comprising a* driven member having means whereby the same may be connected to a polished rod, a sprocket wheel having connection with said. driven member, a chain trained about said wheel, a second sprocket wheel having connection with said chain and constituting an attaching means for one end of the same, a second attaching means for the other end of the chain, and an arm supporting said first and: second named attaching means, said attaching means being adjustable on said arm to vary the elfective movement of the chain. I

In testimony whereof I afiix my signature.

ALEXANDER BOYNTON. 

